Misty Hollow
Land (Rare)

When Misty Hollow enters the battlefield, you lose 1 life unless you reveal an artifact card from your hand.

Tap: Add U to your mana pool. If you played a land this turn, Add B to your mana pool instead.

UB: Misty Hollow becomes a 2/1 blue and black Fish creature until end of turn. It's still a land.

Lars Briclot